NVIDIA Xid 43: GPU Stopped Processing

NVIDIA Xid 43 reports an application software fault. Review the first application error and adjacent GPU events before deciding whether recovery is needed.

Symptom

ROBUST_CHANNEL_RESETCHANNEL_VERIF_ERROR

Root cause

The affected application encountered a software-induced fault. Determine its specific cause from application evidence rather than from Xid 43 alone.

Recommended fix

Preserve the application output and timestamped kernel events from the same failure window.

How Denpex helps

Denpex investigates NVIDIA Xid 43: GPU Stopped Processing using the evidence you provide or your connected workload collects. Earlier rank, host or application evidence is needed to distinguish an initiating failure from a downstream report.

Xid 43 is the NVIDIA catalog event ROBUST_CHANNEL_RESETCHANNEL_VERIF_ERROR. The catalog associates it with an application software fault rather than a diagnosis of defective hardware.

The application encounters a software-induced fault. This code alone does not identify the responsible kernel, input or software component; use the preceding application output to narrow the cause.

• The affected GPU application terminates
• Other ranks can later report timeouts after that application exits

Check possible explanations against the incident evidence. A matching symptom alone does not establish its cause.

• NVIDIA data center and workstation GPUs
• Linux hosts running supported proprietary NVIDIA drivers

Use this checklist to test the hypothesis against a small reproduction. No single line proves the root cause, so preserve the preceding events and compare one variable at a time.

• ✓Confirm that the event code is 43 and preserve its timestamp and device identifier.
• ✓Compare preceding application exceptions with later driver and collective errors.
• ✓Collect independent GPU health evidence if other fault codes or device symptoms are present.

• The affected application encountered a software-induced fault. Determine its specific cause from application evidence rather than from Xid 43 alone.

ROBUST_CHANNEL_RESETCHANNEL_VERIF_ERROR

Use this text as a lookup key in logs and upstream issue trackers. It is not presented as a captured customer log. Confirm the cause from your own preceding events, versions, configuration and the cited references.

The next checks isolate the application failure before any recovery action. The documented identifier shown here comes from the NVIDIA catalog, not from a captured customer trace.

journalctl -k --since "30 minutes ago"
nvidia-smi --query-gpu=uuid,pci.bus_id,name --format=csv

This snippet illustrates the entry-specific check. Verify the installed versions, permissions, target and workload context before using it. A command or API example is not proof of recovery.

Xid 43 identifies a driver-observed event. Preserve the full message, device identity and surrounding workload and host evidence before distinguishing application, driver and hardware causes. The code alone does not justify replacing a board.

Select the traceback or open the failed terminal, then run Denpex locally to inspect matched failure patterns, supporting evidence and next checks without uploading the log. Verify recommendations against your workload before changing production.